Secret key generation scheme that utilizes the randomness of wireless channels is a very promising alternative to establish a secure communication path. Some wireless devices are used to obtain the channel parameters. But the problem that occurs is imprecise measurement results, causing a secret key difference between the two users. To overcome this problem, preprocessing method is used before the data is quantized, to increase the similarity (reciprocity) channel parameter measurement results. In this paper, the effect of the use of one pre-process method, which was hierarchical clustering, on the performance of secret key generation scheme in an indoor environment with two variations of scenario was investigated. The results show that the use of the pre-processing method can improve the similarity parameter of the channel measurement results as indicated by the increasing of correlation values up to 20%. In addition, the resulting bit mismatch also decreases with the value of key disagreement rate (KDR) maximum of 20%.

Abstract-Electronic Health Record (EHR) or medical history has been widely adopted to enable healthcare providers such as hospitals, insurance companies, and patients, to create, organize, and access EHR information from anywhere and at any time. From a health standpoint, to improve the quality of patient care, an EHR storage center is needed to ensure the EHR's novelty at all times. This underlies the need for an efficient, safe, and inexpensive mechanism for sharing EHR among health care providers. Cloud Computing has become a promising paradigm and gains more attention from academia and industry. This paradigm shifts the location of the computer infrastructure to third parties. Cloud computing not only increases the efficiency of storage and exchange of medical data but also allows accessing medical data from anywhere and anytime. In this paper, a mechanism of cloud-based sharing system equipped with the 3DES algorithm to secure health history data and the use of the smart card as a medium for controlling patient information access is proposed. The results of the tests indicate that the built system has fulfilled the security requirements such as privacy, authentication, confidentiality and integrity.Intisari-Electronic Health Record (EHR), atau dikenal dengan riwayat kesehatan, telah diadopsi secara luas untuk memungkinkan penyedia layanan kesehatan seperti puskesmas, rumah sakit, perusahaan asuransi, dan pasien menciptakan, mengatur, dan mengakses informasi EHR dari mana saja dan kapan saja. Dari sudut pandang kesehatan, untuk meningkatkan kualitas perawatan pasien, diperlukan sebuah pusat penyimpanan EHR yang dapat memastikan kebaruan EHR setiap waktu. Hal inilah yang mendasari diperlukannya mekanisme yang efisien, aman, dan murah untuk berbagi EHR antara penyedia layanan kesehatan. Cloud Computing telah menjadi paradigma yang menjanjikan serta mendapat perhatian yang lebih dari akademisi dan industri. Paradigma ini menggeser lokasi dari infrastruktur komputer ke pihak ketiga. Cloud computing tidak hanya meningkatkan efisiensi dari penyimpanan serta pertukaran data medis, tetapi juga memungkinkan pengaksesan data medis dari mana saja dan kapan saja. Pada makalah ini diusulkan sebuah mekanisme sistem sharing berbasis cloud yang dilengkapi dengan algoritme 3DES untuk mengamankan data riwayat kesehatan serta penggunaan smart card sebagai media pengontrolan akses informasi pasien. Hasil pengujian yang dilakukan menunjukkan bahwa sistem yang dibuat telah memenuhi persyaratan keamanan seperti privasi, autentikasi, kerahasiaan, dan keutuhan.Kata Kunci-EHR, Cloud Computing, sharing, 3DES, smart card.I. PENDAHULUAN Di era lingkungan kesehatan modern, EHR, atau dikenal dengan riwayat kesehatan, telah diadopsi secara luas untuk memungkinkan penyedia layanan kesehatan seperti puskesmas, rumah sakit, perusahaan asuransi, dan pasien untuk menciptakan, mengatur, dan mengakses informasi EHR dari mana saja dan kapan saja. Dari sudut pandang kesehatan, untuk meningkatkan kualitas perawatan pasien diperlukan sebuah pusat pen...

Vocational students need hard skills and empowerment to enter the workforce. This community service activity aims to improve the skills of SMK Negeri 6 Surabaya students through training to make simple applications for running text LEDs from the P5 module. Running text is one of the electronic media that is very useful for conveying messages and information. Program activities that have been adapted to the needs of the school. So that this program is able to improve the quality of their hard skills and bring benefits to the community, lecturers, employees, and students of the EEPIS (Electronic Engineering Polytechnic Institute of Surabaya) Computer Engineering Study Program. The implementation method includes an initial survey of partner needs, vocational needs analysis, online training preparation, and installation and delivery of tools. The results of the post-test using a questionnaire showed that 97.9% of participants stated that there was an increase in embedded systems skills, especially in the P5 module and its software applications. There were 85.4% of participants wanted to learn more about embedded systems for other areas of expertise.

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